There's a 90% chance BB10 flops and BlackBerry (BBRY-3.7%) shares go to $7, argues MKM's Michael Genovese, who is cutting the smartphone vendor to Sell. Genovese claims less than 10% of the most popular Android apps, and less than 5% of the most popular iPhone apps, are available on BB10. He also thinks U.K. Z10 momentum has stalled, and that carrier checks "suggest unwillingness to carry heavy BB10 inventory." Several other firms have also issued critical notes on BlackBerry over the last 7 days (I, II, III, IV); shares -15% since the BB10 launch event.